1 /* 2 * arch/arm64/include/asm/hugetlb.h 3 * 4 * Copyright (C) 2013 Linaro Ltd. 5 * 6 * Based on arch/x86/include/asm/hugetlb.h 7 * 8 * This program is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License version 2 as 10 * published by the Free Software Foundation. 11 * 12 * This program is distributed in the hope that it will be useful, 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 * GNU General Public License for more details. 16 */ 17 18 #ifndef __ASM_HUGETLB_H 19 #define __ASM_HUGETLB_H 20 21 #include <asm-generic/hugetlb.h> 22 #include <asm/page.h> 23 24 static inline pte_t huge_ptep_get(pte_t *ptep) 25 { 26 return *ptep; 27 } 28 29 static inline void set_huge_pte_at(struct mm_struct *mm, unsigned long addr, 30 pte_t *ptep, pte_t pte) 31 { 32 set_pte_at(mm, addr, ptep, pte); 33 } 34 35 static inline void huge_ptep_clear_flush(struct vm_area_struct *vma, 36 unsigned long addr, pte_t *ptep) 37 { 38 ptep_clear_flush(vma, addr, ptep); 39 } 40 41 static inline void huge_ptep_set_wrprotect(struct mm_struct *mm, 42 unsigned long addr, pte_t *ptep) 43 { 44 ptep_set_wrprotect(mm, addr, ptep); 45 } 46 47 static inline pte_t huge_ptep_get_and_clear(struct mm_struct *mm, 48 unsigned long addr, pte_t *ptep) 49 { 50 return ptep_get_and_clear(mm, addr, ptep); 51 } 52 53 static inline int huge_ptep_set_access_flags(struct vm_area_struct *vma, 54 unsigned long addr, pte_t *ptep, 55 pte_t pte, int dirty) 56 { 57 return ptep_set_access_flags(vma, addr, ptep, pte, dirty); 58 } 59 60 static inline void hugetlb_free_pgd_range(struct mmu_gather *tlb, 61 unsigned long addr, unsigned long end, 62 unsigned long floor, 63 unsigned long ceiling) 64 { 65 free_pgd_range(tlb, addr, end, floor, ceiling); 66 } 67 68 static inline int is_hugepage_only_range(struct mm_struct *mm, 69 unsigned long addr, unsigned long len) 70 { 71 return 0; 72 } 73 74 static inline int prepare_hugepage_range(struct file *file, 75 unsigned long addr, unsigned long len) 76 { 77 struct hstate *h = hstate_file(file); 78 if (len & ~huge_page_mask(h)) 79 return -EINVAL; 80 if (addr & ~huge_page_mask(h)) 81 return -EINVAL; 82 return 0; 83 } 84 85 static inline int huge_pte_none(pte_t pte) 86 { 87 return pte_none(pte); 88 } 89 90 static inline pte_t huge_pte_wrprotect(pte_t pte) 91 { 92 return pte_wrprotect(pte); 93 } 94 95 static inline void arch_clear_hugepage_flags(struct page *page) 96 { 97 clear_bit(PG_dcache_clean, &page->flags); 98 } 99 100 #endif /* __ASM_HUGETLB_H */ 101